デカクロル化によるPCBの定量法土壌および農作物(玄米)分析への応用

概要

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PCB changed into decachlorobiphenyl by treatment with AlCl3, SO2Cl2 and S2Cl2 at 65_??_70°C for an hour. This was proved by gaschromatography. Chlorination rate of trichloro-, tetrachloro-, and hexachloro-mixtures of PCB were 105, 118, and 112%, respectively, but that of biphenyl was only 8.3%. Soil was steam distillated and the distillate was chlori-nated to determine the PCB content. The 86% recovery of the hexachloro-mixture (9.5 μg) added to 20g of soil was observed by this procedure. Rice grain contains so much oil that the hexane extract was saponified by 1 N KOH ethanol, purified by silica gel column chromatography eluted by hexane and chlorinated to determine PCB content. Recovery of 86% was obtained from 10g of rice grain fortified by 7.2 μg of hexachloro-mixture.
社団法人日本農芸化学会の論文